IIRC, the Garmin BlueChart software will let you look at all the charts, but only download the ones you've unlocked to the GPS. For doing things like setting up waypoints, routes and trip planning, having the software and charts on the laptop are very useful—especially since you can then download the waypoints and routes to the GPS Chartplotter.

Sailingdog

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Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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